indexing
	description: "EiffelVision font selection dialog, mswindows implementation."
	legal: "See notice at end of class."
	status: "See notice at end of class."
	date: "$Date: 2006-07-12 18:00:16 -0700 (Wed, 12 Jul 2006) $"
	revision: "$Revision: 61268 $"

class interface
	EV_FONT_DIALOG_IMP

create 
	make (an_interface: like interface)
			-- Create `Current' with interface `an_interface'.
		require -- from EV_ANY_I
			an_interface_not_void: an_interface /= Void
		ensure -- from EV_ANY_I
			interface_assigned: interface = an_interface
			base_make_called: base_make_called

feature -- Access

	blocking_window: EV_WINDOW
			-- Window this dialog is a transient for.
			-- (from EV_STANDARD_DIALOG_IMP)

	color: WEL_COLOR_REF
			-- Font color
			-- (from WEL_CHOOSE_FONT_DIALOG)
		require -- from WEL_CHOOSE_FONT_DIALOG
			exits: exists
		ensure -- from WEL_CHOOSE_FONT_DIALOG
			result_not_void: Result /= Void

	flags: INTEGER_32
			-- Dialog box creation flags.
			-- Can be a combination of the values defined in 
			-- class WEL_CF_CONSTANTS.
			-- (from WEL_CHOOSE_FONT_DIALOG)

	font: EV_FONT
			-- Font currently selected in `Current'.

	font_type: INTEGER_32
			-- Type of the selected font.
			-- See class WEL_FONT_TYPE_CONSTANTS for values.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		require -- from WEL_CHOOSE_FONT_DIALOG
			selected: selected
		ensure -- from WEL_CHOOSE_FONT_DIALOG
			valid_font_type: valid_font_type_constant (Result)

	generating_type: STRING_8
			-- Name of current object's generating type
			-- (type of which it is a direct instance)
			-- (from ANY)

	generator: STRING_8
			-- Name of current object's generating class
			-- (base class of the type of which it is a direct instance)
			-- (from ANY)

	item: POINTER
			-- Generic Windows handle or structure pointer.
			-- Can be a HWND, HICON, RECT *, WNDCLASS *, etc...
			-- (from WEL_ANY)

	log_font: WEL_LOG_FONT
			-- Information about the selected font
			-- (from WEL_CHOOSE_FONT_DIALOG)

	maximum_size: INTEGER_32
			-- Maximum point size a user can select
			-- (from WEL_CHOOSE_FONT_DIALOG)

	minimum_size: INTEGER_32
			-- Minimum point size a user can select
			-- (from WEL_CHOOSE_FONT_DIALOG)

	point_size: INTEGER_32
			-- Size of the selected font (in units of 1/10 of
			-- a point)
			-- (from WEL_CHOOSE_FONT_DIALOG)
		require -- from WEL_CHOOSE_FONT_DIALOG
			selected: selected

	title: STRING_32
			-- Title of `Current'.
	
feature -- Measurement

	structure_size: INTEGER_32
			-- Size to allocate (in bytes)
			-- (from WEL_CHOOSE_FONT_DIALOG)
		ensure -- from WEL_STRUCTURE
			positive_result: Result > 0
	
feature -- Comparison

	frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void
			-- or attached to isomorphic object structures?
			-- (from ANY)
		ensure -- from ANY
			shallow_implies_deep: standard_equal (some, other) implies Result
			both_or_none_void: (some = Void) implies (Result = (other = Void))
			same_type: (Result and (some /= Void)) implies some.same_type (other)
			symmetric: Result implies deep_equal (other, some)

	frozen equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void or attached
			-- to objects considered equal?
			-- (from ANY)
		ensure -- from ANY
			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.is_equal (other))

	frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void or attached to
			-- field-by-field identical objects of the same type?
			-- Always uses default object comparison criterion.
			-- (from ANY)
		ensure -- from ANY
			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.standard_is_equal (other))

	frozen standard_is_equal (other: like Current): BOOLEAN
			-- Is `other' attached to an object of the same type
			-- as current object, and field-by-field identical to it?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			same_type: Result implies same_type (other)
			symmetric: Result implies other.standard_is_equal (Current)
	
feature -- Status report

	conforms_to (other: ANY): BOOLEAN
			-- Does type of current object conform to type
			-- of `other' (as per Eiffel: The Language, chapter 13)?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void

	exists: BOOLEAN
			-- Does the item exist?
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			Result = (item /= default_pointer)

	has_flag (a_flags: INTEGER_32): BOOLEAN
			-- Is `a_flags' set in flags?
			-- See class WEL_CF_CONSTANTS for `a_flags' values.
			-- (from WEL_CHOOSE_FONT_DIALOG)

	same_type (other: ANY): BOOLEAN
			-- Is type of current object identical to type of `other'?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			definition: Result = (conforms_to (other) and other.conforms_to (Current))

	selected: BOOLEAN
			-- Has the user selected something (file, color, etc.)?
			-- If True, the Ok button has been chosen. If False,
			-- the Cancel button has been chosen.
			-- (from WEL_STANDARD_DIALOG)

	selected_button: STRING_32
			-- Label of last clicked button.
			-- (from EV_STANDARD_DIALOG_IMP)

	shared: BOOLEAN
			-- Is item shared by another object?
			-- If False (by default), item will
			-- be destroyed by destroy_item.
			-- If True, item will not be destroyed.
			-- (from WEL_ANY)
	
feature {ANY} -- Status report

	valid_font_type_constant (c: INTEGER_32): BOOLEAN
			-- Is `c' a valid font type constant?
			-- (from WEL_FONT_TYPE_CONSTANTS)
	
feature -- Status setting

	set_blocking_window (a_window: EV_WINDOW)
			-- Set as transient for `a_window'.
			-- (from EV_STANDARD_DIALOG_IMP)

	set_shared
			-- Set shared to True.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			shared: shared

	set_unshared
			-- Set shared to False.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			unshared: not shared

	show_modal_to_window (a_window: EV_WINDOW)
			-- Show the window and wait until the user closed it.
			-- (from EV_STANDARD_DIALOG_IMP)
		require -- from  EV_STANDARD_DIALOG_I
			True
	
feature -- Element change

	add_flag (a_flags: INTEGER_32)
			-- Add `a_flags' to flags.
			-- See class WEL_CF_CONSTANTS for `a_flags' values.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		ensure -- from WEL_CHOOSE_FONT_DIALOG
			has_flag: has_flag (a_flags)

	remove_flag (a_flags: INTEGER_32)
			-- Remove `a_flags' from flags.
			-- See class WEL_CF_CONSTANTS for `a_flags' values.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		ensure -- from WEL_CHOOSE_FONT_DIALOG
			has_not_flag: not has_flag (a_flags)

	set_color (a_color: WEL_COLOR_REF)
			-- Set color with `a_color'.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		ensure -- from WEL_CHOOSE_FONT_DIALOG
			color_set: color.is_equal (a_color)

	set_dc (a_dc: WEL_DC)
			-- Set a device context `a_dc' of the printer whose
			-- fonts will be listed in the dialog box.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		require -- from WEL_CHOOSE_FONT_DIALOG
			a_dc_not_void: a_dc /= Void
			a_dc_exists: a_dc.exists

	set_flags (a_flags: INTEGER_32)
			-- Set flags with `a_flags'.
			-- See class WEL_CF_CONSTANTS for `a_flags' values.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		ensure -- from WEL_CHOOSE_FONT_DIALOG
			flags_set: flags = a_flags

	set_font (a_font: EV_FONT)
			-- Set the initial font to `a_font'
		require -- from EV_FONT_DIALOG_I
			a_font_not_void: a_font /= Void

	set_item (an_item: POINTER)
			-- Set item with `an_item'
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			item_set: item = an_item

	set_log_font (a_log_font: WEL_LOG_FONT)
			-- Set log_font with `a_log_font'.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		require -- from WEL_CHOOSE_FONT_DIALOG
			a_log_font_not_void: a_log_font /= Void
		ensure -- from WEL_CHOOSE_FONT_DIALOG
			log_font_set: log_font.item = a_log_font.item

	set_maximum_size (size: INTEGER_32)
			-- Set maximum_size with `size'.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		ensure -- from WEL_CHOOSE_FONT_DIALOG
			maximum_size_set: maximum_size = size

	set_minimum_size (size: INTEGER_32)
			-- Set minimum_size with `size'.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		ensure -- from WEL_CHOOSE_FONT_DIALOG
			minimum_size_set: minimum_size = size

	set_title (new_title: STRING_GENERAL)
			-- Assign `new_title' to title.
	
feature -- Element change

	height: INTEGER_32

	minimum_height: INTEGER_32

	minimum_width: INTEGER_32

	screen_x: INTEGER_32

	screen_y: INTEGER_32

	set_height (a: INTEGER_32)
		require -- from EV_POSITIONABLE_I
			a_height_positive_or_zero: a >= 0
		ensure -- from EV_POSITIONABLE_I
			height_assigned: height = minimum_height or else height = a

	set_position (a, b: INTEGER_32)
		ensure -- from EV_POSITIONABLE_I
			x_position_assigned: x_position = a
			y_position_assigned: y_position = b

	set_size (a, b: INTEGER_32)
		require -- from EV_POSITIONABLE_I
			a_width_positive_or_zero: a >= 0
			a_height_positive_or_zero: b >= 0
		ensure -- from EV_POSITIONABLE_I
			width_assigned: width = minimum_width or else width = a
			height_assigned: height = minimum_height or else height = b

	set_width (a: INTEGER_32)
		require -- from EV_POSITIONABLE_I
			a_width_positive_or_zero: a >= 0
		ensure -- from EV_POSITIONABLE_I
			width_assigned: width = minimum_width or else width = a

	set_x_position (a: INTEGER_32)
		ensure -- from EV_POSITIONABLE_I
			x_position_assigned: x_position = a

	set_y_position (a: INTEGER_32)
		ensure -- from EV_POSITIONABLE_I
			y_position_assigned: y_position = a

	width: INTEGER_32

	x_position: INTEGER_32

	y_position: INTEGER_32
	
feature -- Removal

	dispose
			-- Destroy the inner structure of `Current'.
			--
			-- This function should be called by the GC when the
			-- object is collected or by the user if `Current' is
			-- no more usefull. 
			-- (from WEL_ANY)
	
feature -- Duplication

	frozen deep_copy (other: like Current)
			-- Effect equivalent to that of:
			--		copy (`other' . deep_twin)
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			deep_equal: deep_equal (Current, other)

	frozen deep_twin: like Current
			-- New object structure recursively duplicated from Current.
			-- (from ANY)
		ensure -- from ANY
			deep_equal: deep_equal (Current, Result)

	frozen standard_copy (other: like Current)
			-- Copy every field of `other' onto corresponding field
			-- of current object.
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		ensure -- from ANY
			is_standard_equal: standard_is_equal (other)

	frozen standard_twin: like Current
			-- New object field-by-field identical to `other'.
			-- Always uses default copying semantics.
			-- (from ANY)
		ensure -- from ANY
			standard_twin_not_void: Result /= Void
			equal: standard_equal (Result, Current)

	frozen twin: like Current
			-- New object equal to `Current'
			-- twin calls copy; to change copying/twining semantics, redefine copy.
			-- (from ANY)
		ensure -- from ANY
			twin_not_void: Result /= Void
			is_equal: Result.is_equal (Current)
	
feature -- Basic operations

	activate (a_parent: WEL_COMPOSITE_WINDOW)
			-- Activate the dialog box (modal mode) with
			-- `a_parent' as owner.
			-- (from WEL_CHOOSE_FONT_DIALOG)
		require -- from WEL_STANDARD_DIALOG
			a_parent_not_void: a_parent /= Void
			a_parent_exists: a_parent.exists
		require -- from  EV_STANDARD_DIALOG_IMP
			True

	copy (other: like Current)
			-- Update current object using fields of object attached
			-- to `other', so as to yield equal objects.
			-- (from WEL_STRUCTURE)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		ensure -- from ANY
			is_equal: is_equal (other)

	frozen default: like Current
			-- Default value of object's type
			-- (from ANY)

	frozen default_pointer: POINTER
			-- Default value of type `POINTER'
			-- (Avoid the need to write `p'.default for
			-- some `p' of type `POINTER'.)
			-- (from ANY)

	default_rescue
			-- Process exception for routines with no Rescue clause.
			-- (Default: do nothing.)
			-- (from ANY)

	frozen do_nothing
			-- Execute a null action.
			-- (from ANY)

	structure_initialize
			-- Fill Current with zeros.
			-- (from WEL_STRUCTURE)
		require -- from WEL_STRUCTURE
			exists: exists

	initialize_with_character (a_character: CHARACTER_8)
			-- Fill current with `a_character'.
			-- (from WEL_STRUCTURE)
		require -- from WEL_STRUCTURE
			exists: exists

	is_equal (other: like Current): BOOLEAN
			-- Is `other' attached to an object considered
			-- equal to current object?
			-- (from WEL_STRUCTURE)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			symmetric: Result implies other.is_equal (Current)
			consistent: standard_is_equal (other) implies Result

	memory_copy (source_pointer: POINTER; length: INTEGER_32)
			-- Copy `length' bytes from `source_pointer' to item.
			-- (from WEL_STRUCTURE)
		require -- from WEL_STRUCTURE
			length_small_enough: length <= structure_size
			length_large_enough: length > 0
			exists: exists
	
feature -- Event handling

	cancel_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when user cancels.
			-- (from EV_STANDARD_DIALOG_ACTION_SEQUENCES_I)
		ensure -- from EV_STANDARD_DIALOG_ACTION_SEQUENCES_I
			not_void: Result /= Void

	create_cancel_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Create a cancel action sequence.
			-- (from EV_STANDARD_DIALOG_ACTION_SEQUENCES_IMP)
		require -- from  EV_STANDARD_DIALOG_ACTION_SEQUENCES_I
			True

	create_ok_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Create a ok action sequence.
			-- (from EV_STANDARD_DIALOG_ACTION_SEQUENCES_IMP)
		require -- from  EV_STANDARD_DIALOG_ACTION_SEQUENCES_I
			True

	ok_actions: EV_NOTIFY_ACTION_SEQUENCE
			-- Actions to be performed when user clicks OK.
			-- (from EV_STANDARD_DIALOG_ACTION_SEQUENCES_I)
		ensure -- from EV_STANDARD_DIALOG_ACTION_SEQUENCES_I
			not_void: Result /= Void
	
feature -- Output

	io: STD_FILES
			-- Handle to standard file setup
			-- (from ANY)

	out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- Was declared in ANY as synonym of tagged_out.
			-- (from ANY)

	print (some: ANY)
			-- Write terse external representation of `some'
			-- on standard output.
			-- (from ANY)

	frozen tagged_out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- Was declared in ANY as synonym of out.
			-- (from ANY)
	
feature -- Platform

	operating_environment: OPERATING_ENVIRONMENT
			-- Objects available from the operating system
			-- (from ANY)
	
invariant
		-- from EV_ANY_I
	interface_coupled: is_usable implies interface /= Void and then interface.implementation = Current
	base_make_called: base_make_called

		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

		-- from EV_POSITIONED_I
	minimum_width_positive_or_zero: is_usable implies minimum_width >= 0
	minimum_height_positive_or_zero: is_usable implies minimum_height >= 0

indexing
	copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	source: "[
		Eiffel Software
		356 Storke Road, Goleta, CA 93117 USA
		Telephone 805-685-1006, Fax 805-685-6869
		Website http://www.eiffel.com
		Customer support http://support.eiffel.com
	]"

end -- class EV_FONT_DIALOG_IMP